Audax Group has acquired Astrodyne Corp. from American Capital Strategies for an undisclosed amount. Madison Capital funding provided leveraged financing, while Astrodyne was advised by Lincoln International. Astrodyne is a Mansfield, Mass.-based maker of AC/DC power supplies, DC/DC converters and external and wall-mount power adapters.

AXA Private Equity has bought a majority stake in Löwen Play from Waterland Prirvate Equity Investments. No financial details were disclosed. Löwen operates around 200 amusement arcades in Germany.

Castle Harlan has completed its acquisition ofAnchor Drilling Fluids USA Inc. from American Capital Strategies for approximately $250 million. Anchor Drilling is a Tulsa, Ok.-based provider of drilling fluids and fluid-handling services for onshore oil and gas drilling.